[Isocops] IBEX ORbit# 355 ATS Approval (27 Jan 17 - 5 Feb 17) - v001 approval

Sun Jan 15 18:22:43 EST 2017

All, 

I have looked at the orbit 355 ATS, 

IBEX_2017_027_o0355a_v001.scr, 

and I approve. 

The only constraint violations in 

IBEX_2017_027_o0355a_v001.ccvr 

are due to the eclipse and because we removed the 

ACT_SetSpinPulseProtectEnable Enable 

commands (2); the violations are expected. 

The PL commands in the v001 ATS match those in the v003 STF, 

IBEX_2017_027_o0355a_v003.stf. 

Ascending and descending command sequences are consistent with each other and 15 Re ascending, the apogee maneuver time and 15 Re descending as determined from the OEF, 

IBEX_2017_027_o0355a_v001.oef, 

and as verified with ibex_orbit. 

There is one star tracker outage. The outage starts 9 hours before apogee and runs for almost 3 1/2 days. Some despinning may be required due to this outage. 

There is one moon in Lo FOV session in arc A. The ATS start time is an hour after that in the OEF. The session ends so soon after the apogee ascending sequence that there is no start/stop sequence in the ATS. The difference in the start times is not unusual. 

The ground station command sequences are correct and the timing and bit rates match those in the contacts file, 

IBEX_Orbit355_Contacts.txt, 

for all contacts (3). 

The long eclipse flag on/off command timing matches Ryan's recommendations for the perigee eclipse. The commands are offset by enough time from the maneuver and the descending sequence. 

The inertial maneuver at perigee of orbit 354 left us pointing in safe directions for the orbit 355 arc A ascending and descending sequences: 

ibex_rotate -o -u 0.621391,-0.675047,-0.397724 -w ibex-sun -t 2017/01:28:06:57:03 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.621391,-0.675047,-0.397724 

which is R.A. +312.630 Decl. -23.436 

missing R.A. +310.769 Decl. -18.195 (ibex-sun) 

error is R.A. +1.861 Decl. +5.241 

for a total 5.522 deg 

ibex_rotate -o -u 0.621391,-0.675047,-0.397724 -w ibex-sun -t 2017/01:31:21:30:47 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.621391,-0.675047,-0.397724 

which is R.A. +312.630 Decl. -23.436 

missing R.A. +314.486 Decl. -17.219 (ibex-sun) 

error is R.A. +1.856 Decl. +6.217 

for a total 6.456 deg 

The inertial precession maneuver at apogee leaves us pointing in safe directions at the time of the maneuver and for arc B ascending and descending sequences: 

ibex_rotate -o -u 0.684435,-0.665305,-0.298191 -w ibex-sun -t 2017/01:31:23:13:55 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.684435,-0.665305,-0.298191 

which is R.A. +315.812 Decl. -17.349 

missing R.A. +314.558 Decl. -17.198 (ibex-sun) 

error is R.A. +1.254 Decl. +0.151 

for a total 1.207 deg 

ibex_rotate -o -u 0.684435,-0.665305,-0.298191 -w ibex-sun -t 2017/02:01:00:49:01 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.684435,-0.665305,-0.298191 

which is R.A. +315.812 Decl. -17.349 

missing R.A. +314.624 Decl. -17.179 (ibex-sun) 

error is R.A. +1.188 Decl. +0.170 

for a total 1.147 deg 

ibex_rotate -o -u 0.684435,-0.665305,-0.298191 -w ibex-sun -t 2017/02:05:11:25:40 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.684435,-0.665305,-0.298191 

which is R.A. +315.812 Decl. -17.349 

missing R.A. +319.037 Decl. -15.843 (ibex-sun) 

error is R.A. +3.225 Decl. +1.506 

for a total 3.438 deg 

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 356 apogee: 

ibex_rotate -o -u 0.738917,-0.573494,-0.353703 -w ibex-sun -t 2017/02:05:13:43:12 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.738917,-0.573494,-0.353703 

which is R.A. +322.184 Decl. -20.714 

missing R.A. +319.135 Decl. -15.815 (ibex-sun) 

error is R.A. +3.048 Decl. +4.899 

for a total 5.690 deg 

ibex_rotate -o -u 0.738917,-0.573494,-0.353703 -w ibex-sun -t 2017-02-10T15:04:00.358Z 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.738917,-0.573494,-0.353703 

which is R.A. +322.184 Decl. -20.714 

missing R.A. +324.263 Decl. -14.236 (ibex-sun) 

error is R.A. +2.079 Decl. +6.478 

for a total 6.775 deg 

No Lo O-mode. 

There is no overlap with orbit 354 commands by manual inspection or by checking at 

http://ibex.unh.edu/cgi-bin/ats.cgi . 

Command Approval Checklist is attached. 

Ken 

----- Original Message -----

From: "Sheral Wesley" <Sheral.Wesley at OrbitalATK.com> 
To: "David Heirtzler" <dheirtzl at atlas.sr.unh.edu>, "IBEX-FDG" <IBEX.fdg at applieddefense.com>, "IBEXOPS" <IBEXOPS at gmail.com>, "ISOC" <isocops at lists.sr.unh.edu>, "Ken Fairchild" <fair-play at comcast.net>, "Ken Fairchild" <kwfairchild at gmail.com>, "Robert Lockwood" <Robert.Lockwood at OrbitalATK.com>, "Michelle Reno" <mreno at swri.edu>, "Nigel Angold" <nigel.angold at nasa.gov>, "Paul Janzen" <paul.janzen at umontana.edu>, "Timothy Perry" <Timothy.Perry at OrbitalATK.com>, "Ryan Tyler" <Ryan.Tyler at OrbitalATK.com>, "Sheral Wesley" <Sheral.Wesley at OrbitalATK.com> 
Sent: Friday, January 13, 2017 2:49:21 PM 
Subject: IBEX ORbit# 355 ATS Approval (27 Jan 17 - 5 Feb 17) 

Guys, 

Here are the planning files and ATS for Orbit# 355. 

Please respond to this email thread with your comments and approvals 

Approvals are required before 1100 UTC on 14 Feb 17 

Note the following: 

1. Moderate Eclipse 

Orbit# 352 PERIGEE: Moderate Eclipse Commands 

# 2017-02-05T23:17:28.536Z,Perigee,orbit:355 

# 2017-02-06T01:24:45.111Z,EclipseEntry,moderate:true,long:false,orbit:355 

# 2017-02-06T02:40:48.410Z,EclipseExit,moderate:true,long:false,orbit:355 

SetLongEclipseFlag TRUE $TIME=2017/02:05:23:20:00 

SetLongEclipseFlag FALSE $TIME=2017/02:06:02:50:00 

2. Moon in FOV Commands 

Orbit# 355 APOGEE: Moon in Lo FOV Commands 

# 2017-01-31T04:04:12.099Z,MoonInLoFovStart,orbit:355 

# 2017-02-01T09:27:50.738Z,MoonInLoFovStop,orbit:355 

LO_PMT_LVL 300 $TIME=2017/01:31:05:07:15 

LO_IF_STAR_ADJ 0 $TIME=2017/01:31:05:07:17 

3. Command Load Constraint Violation Report 

IBEX_2017_027_o0355a_v001.scr 

========================== 

HARD CONSTRAINT VIOLATIONS 

========================== 

NO VIOLATIONS. 

========================== 

SOFT CONSTRAINT VIOLATIONS 

========================== 

IBX-CLC-015: Battery charge falls below minimum from 2017/02/06 02:18:45 UTC - 

2017/02/06 03:31:48 UTC. Lowest charge level is 6559.536732 

watt-minutes during this interval. 

IBX-CLC-016: No command to enable spin pulse protection was found after 

transition to science mode at 2017/01/28 05:25:48 UTC 

IBX-CLC-016: No command to enable spin pulse protection was found after 

transition to science mode at 2017/02/01 00:19:01 UTC 

============== 

OTHER MESSAGES 

============== 

NO MESSAGES. 

Sheral R. Wesley 

IBEX Mission OPS 

CRS/CYGNUS Mission Planning 

Bldg. 2 Room 1337 

Office (703) 406-5641 

Cell (202) 236-0802 

Notice: This e-mail is intended solely for use of the individual or entity to which it is addressed and may contain information that is proprietary, privileged and exempt from disclosure under applicable law. If the reader is not the intended recipient or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. This communication may also contain data subject to U.S. export laws. If so, data subject to the International Traffic in Arms Regulation cannot be disseminated, distributed, transferred, or copied, whether incorporated or in its original form, to foreign nationals, residing in the U.S. or abroad, absent the express prior approval of the U.S. Department of State. Data subject to the Export Administration Act may not be disseminated, distributed, transferred or copied contrary to U. S. Department of Commerce regulations. If you have received this communication in error, please notify the sender by reply e-mail and destroy the e-mail message and any physical copies made of the communication. 
Thank you. 
********************* 

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